milwaukeeman "PAQ8PF is based on PAQ8PX with modifications to make it much faster compressing most files at levels -4 and above. Compression ratio will not be as good as PAQ8PX for most files. I will include the source code with the final release."
"paq8px is paq version based on paq8p with improved/added models/detection from paq8p3
DIFFERENCES FROM PAQ8P
Added nestModel from paq8p3
Modified wordModel from paq8p3
Modified .pbm, .pgm, .ppm, .bmp, .rgb detection (from paq8p3)
Modified WAV model (from paq8p_)
Modified JPEG model (from paq8p2)
Renamed bmpModel (24-bit) to im24bitModel + .ppm compression added (from paq8p3)
Added bmpModel1 (1-bit) and PBM models (from paq8p3)
Removed pic model"
(
http://encode.dreamhosters.com/showthread.php?t=457 http://encode.dreamhosters.com/showthread.php?t=342 )
64 это не архитектура а номер релиза (последний уже 67 вроде)